2] is a common product of the thermal treatment of organic matter, while its high amounts are typically produced upon the generation of hydrocarbons from the thermal cracking of kerogen, probably due to decarboxylation of organic acids and esters.

This observationled us to propose that the reaction maybe take place through the initial formation of azomethineylide 4 by decarboxylation of 5',6',7',7a'-tetrahydro-1'H-spiro-[indene-2,3'-pyrro-lo[1,2-c]oxazole]-1,1',3-trione3.

In addition, the decarboxylation reaction of 2,6-NDA can form naphthalene [39,40], which can be oxidized to form phthalic anhydride [41,42] and produced the observed phthalic acid by hydrolysis [39,43].

In the case of the hydroprocessing of vegetable oils, the liquid products consist of straight chain n-alkanes with 15-20 carbons, which are formed via three different reaction pathways: decarbonylation, decarboxylation, and hydrodeoxygenation (Sotelo-boy et al.

Histamine is one of the weak known biogenic amine found in several foods such as fish products, cheese, wine, and fermented products and it is a product of microbial decarboxylation of histidine present in the foods (Bakirci et al, 2000).

Ketosis (ketonemia and ketonuria) is a metabolic disorder in dairy animals caused by impaired metabolism of carbohydrate and volatile fatty acids leading to excessive production of ketone bodies: Acetoacetic acid, beta-hydroxybutyric acid and their decarboxylation products such as acetone and isopropanol (Radostits et al.

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